1-benzoylamino-4-(3&#39; sulfonamido)-benzoylamino-anthraquinones and their preparation



Patented May 2, 1950 1 BENZOYLAMDNO 4 (3' SULFONAIVIIDQ):

BENZQYLAMINO-ANTHRAQUINONES AND THEIR PREPARATION Walter JenmgReinach, near Basel, and Walter Kenn, 'Sissach, Switzerland, assignors to Cibae LimiteiBasel, Switzerland "jNoDrawing. Application December 6, 1918, Se

rial No. 63,847 1947 According to the present invention, unexpectedly valuable vat dyestuffs are 'made by treating with an :acylati-ng agent a l-acylamino 4-aminoanthraquinone, and so selecting the acylating :agent and the 1-.acy1aminol -,arriirzioanthraquinone that one of the two acyl groups present in the final product is the residue of a benzene-l-carboxylic acid-3-dialkylsulphonamide and the other of such acyl groups is the residue of an aromatic carboxylic acid of the benzene series free from sulphonamido groups, and that asubstituent is present at least in the anthra quinone nucleus or the aromatic nucleus of the residue of the carboxylic acid free from sulphon .amido groups.

"The 1-acylamino-4-aminoanthraquinones serving as starting-materials can be obtained in known manner, for example, by "monoacylating a 1:4 diaminoanthraquinone or by acyla-ting a l-amino- 4-nitroanthraquinone and subsequently reducing the nitro group. The acylamino group in the l-position may contain as an acyl residue, for example, the residue of a benzoic acid-3-diallrylsulphonamide. In the dialkylsulphonamidogroup the two alkyl residues are advantageously of low molecular weight, that is to say, they contain only few, for example, less than four, carbon atoms per alkyl residue. As examples there may be mentioned an .N-diethylsulphonamido group and especially an N-dimethylsulphonamido group, The two alkyl residues of a sulphonamido group may be connected together by a bridge member, for example, by an oxygen atom or a methylene group, as in the case of sulphon-morpholido and sulphon-piperidido groups.

When a 1-(3'-diall .:ylsu1phonamido -benzoylamino-4raminoanthraquinone is used as starting material it must be treated with an .acylating agent which intrroducesthe residue of an arc.- matic oarboxylic acid of the benzene series free from sulphonamido groups. As examples of such acylating agents there may be mentioned reactive functional derivatives of benzoic acid, especially the acid halides and preferably the acid chloride. The residue of the cyclic carboxylic acid may contain substituents, for example, a halogen atom, an alkoxy group or another substituent. which is not harmful :in vat dyestufis, such as an alkyl group, a cyano group or an alkylsulphone or arylsulphone group, such substituent being present advantageously in para-position to the carboxylic acidgroup. The yat dyestuffs may be-made inthe reverse manner by using-as the starting material a 1- acylaznino a-aminoanthraquinone containing the In Switzerland December 24,

2 residue" of a cyclic carboxylic acid free from sulphonamido groups (see-for example, the resi dues mentioned above). In this case there must be used an acylating agent which is capable of introducing the residue of a benzene-l-car boxylic acid-3-dialkylsulphonamide.

The components must also be so chosen that a substituent is present in the anthra uinone nucleus or in the aromatic nucleus of the car boxylic acid free "from sulphonam'ido groups or in both nuclei. As such a substituent there comes into consideration, as mentioned above, for ex ample, a cyano, alkyl or alkoxy group and espe cially a halogen atom. In many cases especially favourable results are obtained with a halogen atom, advantageously a chlorine atom, which as present in a 'c-position'in the anthraquinone nucleus, 'preferably'in the 6- or 7-p0sition.

It be apparent from the foregoing that there may be used as starting materials, for example, 1 (3" dimethylsulphonamido) bemzoylamino-4-aminoanthraquinone and its 6- or 'T-chloro-derivative, 1- 3 -sulphon-morpholido) benzoylamino-4-aminoanthraquinone and its 6- or '7 chloro derivative, 1 (3 sulphon piperidido) -benzoylan1-ino-e-aminoanthraquinone and its 6- or 7-chloro-deriva-tive. In many cases mixtur s of aminoanthraquinone components may be used, which contain both the 6- and "I chloro derivative. These aminoanthraduinone components maybe reacted, for example, with functional derivatives of the following acids: '4- methoxybenzoic acid, 4-bromoand especially 4- chloro-benzoic acid When starting material is substituted inthe' anthraquinone nucleus, there may be used a functional derivative of benzoic acid itself, especially benzoyl chlofideh,

Conversely, there come into consideration the following starting materials l-benzoylamino-- amino-S- or 'Z-chloranthraqUinone, I-(4-methoxy) -benzoylamino-4-aminoanthraquinone or its 6- or 'l-chl"oro-derivative, 1-(4-chloro-- or 4- bromo) benzoylamino 4 aminoanthraquinone or its :6- or 'I-chloro-derivatite. Such aminoanthraquinone components may be reacted, for example, with iunctional derivatives, advantage. ously acid chlorides of the following. acids? Benzoic :acid 3 dimethylsulphonamide, benzoic acid-3-diethylsulphonamide, benzoic acid-B-Sulf phon-morpholide, benzoic acid-3-sulphon-piper idide or '4-chlorobe-naoic acid-3-dimethylsulphon amide.

The treatment oft-he aminoanthtaquinon components with acyl-ating agents maybe con ducted with advantage-in an inert solvent or diluent, advantageously of relatively high boiling point such as nitrobenzene or mono-, dior trichlorobenzene or naphthalene, generally at a high temperature, for example, 100 C. to the boiling point of the solvent or diluent in question.

The vat dyestuffs obtained by the process of the invention correspond to the general formula NIL-CO-R;

in which R1 CO- represents the residue of an aromatic carboxylic acid of the benzene series free from sulphonamido groups, X represents a dialkylsulphonamido group, one 11 stands for hydrogen and the other y for hydrogen or for a substituent consisting of a halogen atom and R2 represents a benzene nucleus to which the -CO-- group and the group X are bound in the 1:3-position, and a substituent is present at least in the anthraquinone nucleus or in the nucleus R1.

These vat dyestufis can be used as pigment dyestuffs or for dyeing and especially for printing a very wide variety of fibers, such as wool, leather or silk, but principally vegetable cellulosic fibers such as linen, cotton, artificial silk or staple fibers of regenerated cellulose. They may also be used in the form of their leuco ester salts (especially sulfuric acid esters), obtainable by methods known in connection with dyestuffs of this class.

The following examples illustrate the invention, the parts and percentages being by weight unless otherwise stated and the relationship of parts by weight to parts by volume being the same as that of the kilogram to the liter:

Example 1 (t HNCO OKs-CH2 SOLN O CHr-Ca is separated by filtering with suction, well washed with boiling alcohol and dried. It dissolves in concentrated sulfuric acid with a red-violet coloration and dyes cotton from a violet vat very fast, pure bluish-pink tints.

Benzoic acid-3-sulphon-mcrpholide may be prepared as follows: r

' 11 parts of benzoic acid-3-sulphochloride 'are added slowly with thorough stirring to a solution or 17 parts of morpholine in 150 parts of water at ordinary temperature. When the addition is complete, the temperature is raised, while stirring, to 50 C. in the course of 2 hours, and then the whole is, allowed to cool. The sulphonmorpholide precipitated with dilute hydrochloric acid forms a white crystalline powder. Upon recrystallisation from water the product is obtained in the form of handsome colorless lamellae.

1 benzolyamino 4 amino 6 chloranthraquinone can be prepared by the benzoylation and subsequent reduction of 1-amino-4-nitrochloranthraquinone (compare United States Patent No. 2,134,654, Example 3). 15 parts of 1-amino-4-nitro-fi-chloranthraquinone are suspended in 150 parts of dry ortho-dichlorobenzene and, after the addition of 15 parts of benzoyl chloride, the whole is stirred for 3 hours at the boil. The yellow benzoylamino-compound, which is isolated by cooling, filtration, and washing with alcohol is suspended in 7 times its weight of ortho-dichlorobenzene, mixed with twice its weight of phenyl-hydrazine and stirred for 1 hour at 135-140 C. Upon cooling, l-benzoylamino--amino-6-chloranthraquinone crystallises in violet needles.

- Example 2 27.5 parts of benzoic acid 3 sulphonmorpholide are suspended in 380 parts of dry nitrobenzene and, after the addition of 15 parts of thionyl chloride, stirred for 1% hours at -100" C. The whole is then mixed with 30 parts of 1 (para methoxy benzoylamino) 4- amino-G-chloranthraquinone and the whole is stirred for 2 hours at -130" C. The dyestufl which precipitates upon cooling in the form of small red crystals and which corresponds to the probable formula J HNO 0000B,

A HNO 0 /CH:CH1 SOLN 0 Example 3 18.5 parts of benzoic acid-3-dimethylsulphonamide are suspended in 270 parts of dry nitrobenzene and, after the addition of 12 parts of thionyl chloride and 0.5 part of pyridine, stirred for 1% hours at 70-80 C. There are then added 30 parts of 1-benzoylamlno 4-amino-6-chloranthraquinone and the whole is stirred for 2 hours at -130-C. The dyestuff which separates upon cooling in the form" oi' small 'red needles and which corresponds to the probable formula HNCO is separated by filtering with suction, washed well with boiling alcohol and dried. Itdissolves in concentrated sulfuric acid with a violet-red coloration and dyes cotton from aviolet vat very fast pure pink tints.

Benzoic acid-3-dimethylsulphonamide can .be prepared in the same manner as the corresponding sulphon-morpholide (see Example 1).

Example 4 55 parts of l-amino-4-(3-dimethylsulphonamido-benzoy1amino)-7-chloranthraquinone are suspended in 400 parts of dry nitrobenzene and, after the addition of 45 parts of benzoyl chloride, stirred for 3 hours at 125-135 C. The dyestuff, which precipitates upon cooling in the form of small red crystals and which corresponds to the probableiormula:

0 HNO 0-0 H sOlN HNO 0-- and after the addition of 30 parts of thionyl chloride and 0.5 part ofpyridine stirred for 1 hours at 7080 C. The whole is then mixed with 60 parts: of l-amino-ei-nitro-fi-chloranthraquinone'and stirred for a further 2 hours at 125-135? C. The l-nitroi-(3-dimethyl-sulphonamidobenzoylamino) 7 chloranthraquinone, which precipitates upon cooling in the form of yellow crystals is separated by filtering with suction, washed well with hot alcohol, and then suspended in 10 times itsweight of ortho-dichlorobenzene and, after the addition of 3 times its weight of phenyl-hydrazine, stirred for 1 hour at l35-145 C. Upon cooling, 1,-amino-4-(3'-dimethyl-sulphonamido-benzoylamino) 7 chloranthraquinone precipitates in the form of violet crystals.

Example 5 23 parts or benzoic' acid-3-dimethylsulphonamide are suspended in 320 parts of dry nitrobenzene and after the addition of 15 parts of thionyl chloride and035 partoi pyridine, stirred for 1 /2 hours at 70-80 C. The whole is thm mixed with 37 parts. of 1-(4'-chlorobenzoylamino)-4-aminoanthraquinone, and stirred for a further 2 hours at 120-130 C. The dyestufl, which precipitates upon cooling in the form of orange red crystals and which corresponds to the probable formula SOIN is separated by filtering withsuctionand washed well with boiling alcohol. It dissolves in con centrated hydrochloric acid with a red coloration and dyes cotton from a violet vat fast orange colored tints.

Emample 6 is separated by filtering with suction, washed with boiling alcohol and dried. It dissolves in concentrated. sulfuric acid with a red coloration and dyes cotton orange tints from a violet vat.

4-chlorobenzoic acid-3 dimethy1sulphonamide is prepared in the same manner as b'enzoic acid 3-sulphon-morpholide (see Example 1) fr-o m'th corresponding sulphochloride and an excess'oi dimethylamine in aqueous solution.

Example 7 1 part of the dyestuif obtained as described in Example 1 is vatted' at 50 C. in parts of water by the addition of 4 parts by volume of caustic soda solution of 36 B. and Zparts of sodium hydrosulphite. The resulting stock vat is added to a dyebath consisting of 3000'parts of water, 8 parts byvolumeof caustic soda solution of 36? B. and 3 parts of sodium hydrosulphite. 100 parts of cotton are entered at 25 0., 4-5 parts of sodium-chloride are added after 15 minutes, and dyeing is carried on at 25-30 C. for 1 hour. The cotton isthen finished in the usual manner. After soa'ping there are obtained very fast} blush pink tints.

8. Having thus described the invention, what is 4. The vat dyestuff of the formula claimed is: a

- 1. 'A vat dyestuif of the formula No. 1 v Y Y 5 A HNC 0- c 5. The vat dyestuff of the formula wherein Y stands for a substituent selected from the group consisting of hydrogen, halogen, a I j methoxy and a cyano group, wherein one X stands T O for a halogen atom and the other X for a hydro- I gen atom, and wherein R stands for a substituent selected from the group consisting of 01 I alkyl g alkyl som o GHQ-0H, which alkyl groups contain less than four carbon a 6. The vat dyestuff of the formula CHr-CH:

so N/ on I CHs-C a l and orb-0g, Cl -SO5N\ /O CHPCH: A HNCO-O cm 40 A 2. A vat dyestufi which corresponds to the formula 0H;

7. A process for the manufacture of vat dye- 0' 4 stufl's, which comprises reacting one molecular proportion of a compound which corresponds to z the formula NET-O 0- 0 l O o HNCO-O CH V x SIO:N OH: X I H v in which one .1: stands for a halogen atom and the 0 other a: for a hydrogen atom.

' 3. A vat dyestufi which corresponds to the formula wherein Y stands for a substituent selected from the group consisting of hydrogen, halogen, a methoxy and a cyano group and wherein one X stands for a halogen atom and the other X stands 0 ENG for hydrogen, with one molecular proportion of a benzoic acid chloride of the formula 4 v i I I .v I I a o1-oo o HNCOQ Y R CHa-(JH:

sorN 0 wherein R stands for a substituent selected from Q, the group consisting of I v alkyl in which one x' stands for a halogen atom and -S0+N the other}: for a hydrogen atom. V m1 I 10 which alkyl groups contain less than four carbon REFERENCES CITED atoms The following references are of record in the un-0g, file of this patent: -SO=N /CH: 5 UNITED STATES PATENTS Number Name Date and 2,190,751 Zerweck Feb. 20, 1940 2 356 061 Irving at 2.1 Aug. 15 1944 C I I J 2,439,626 Kern Apr. 13, 1940 0 2,453,104 Vogt Nov. 2,1948

CHa-CH:

WALTER JENNY. WALTER KERN. 

1. A VAT OF DYESTUFF OF THE FORMULA 